High Energy Neutrinos from the Fermi Bubbles

Abstract

Recently the Fermi-LAT data have revealed two gamma-ray emitting bubble-shaped structures at the Galactic center. If the observed gamma rays have hadronic origin (collisions of accelerated protons), the bubbles must emit high energy neutrinos as well. This new, Galactic, neutrino flux should trace the gamma ray emission in spectrum and spatial extent. Its highest energy part, above 20-50 TeV, is observable at a kilometer scale detector in the northern hemisphere, such as the planned KM3NeT, while interesting constraints on it could be obtained by the IceCube Neutrino Observatory at the South pole. The detection or exclusion of neutrinos from the Fermi bubbles will discriminate between hadronic and leptonic models, thus bringing unique information on the still mysterious origin of these objects and on the time scale of their formation.

4+2 pages and 4+6 figures including supplementary material. Minor changes in text from the previous version. Accepted for publication in Phys. Rev. Lett

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• Neutrino Events at IceCube and the Fermi Bubbles
• Hint for a TeV neutrino emission from the Galactic Ridge with ANTARES
• Prospects for Detecting Galactic Sources of Cosmic Neutrinos with IceCube: An Update
• A Search for Neutrino Emission from the Fermi Bubbles with the ANTARES Telescope
• Detection Potential of the KM3NeT Detector for High-Energy Neutrinos from the Fermi Bubbles
• Multi-wavelength Emission from the Fermi Bubble III. Stochastic (Fermi) Re-Acceleration of Relativistic Electrons Emitted by SNRs
• A multi-messenger study of the Fermi Bubbles: very high energy gamma rays and neutrinos
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• IceCube and HAWC constraints on very-high-energy emission from the Fermi bubbles
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• How Unequal Fluxes of High Energy Astrophysical Neutrinos and Antineutrinos can Fake New Physics
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